Built-in telescopic anti-rotation mechanism of double-section oil cylinder

Abstract

The invention provides a double-section oil cylinder built-in telescopic anti-rotation mechanism, and relates to the technical field of double-section oil cylinders, the double-section oil cylinder built-in telescopic anti-rotation mechanism comprises a telescopic oil cylinder main body, a base is fixed at the bottom end of the telescopic oil cylinder main body, and a first piston rod is slidably connected in the telescopic oil cylinder main body; the end, away from the telescopic oil cylinder body, of the first piston rod is slidably connected with a second piston rod, and a limiting rod is fixed to the inner wall of the telescopic oil cylinder body. Through the arrangement of a limiting rod and a connecting sleeve, when oil enters the telescopic oil cylinder body through a first oil inlet, a first piston rod is pushed and extruded to drive the first piston rod to move, and when the first piston rod moves to the limit, a second oil inlet in the outer wall of the first piston rod can communicate with a second oil inlet in the outer wall of the first limiting sleeve at the moment; at the moment, oil is fed through a second oil inlet, a second piston rod can be pushed to move, and when the second piston rod moves, due to limiting sliding of a limiting rod and a connecting sleeve, the second piston rod cannot rotate.

Description

Technical Field

[0001] The present invention relates to the technical field of double-section oil cylinders, and in particular to a double-section oil cylinder with a built-in telescopic anti-rotation mechanism. Background Art

[0002] In construction machinery such as cranes and aerial work platforms, two-section hydraulic cylinders are often used to extend and retract the boom or work platform. For example, if a two-section hydraulic cylinder rotates during the crane's outrigger extension and retraction process, the outrigger's position and posture could be inaccurate, affecting the crane's stability and safety, and potentially even causing an accident. Therefore, an anti-rotation mechanism is required to ensure the cylinder's stability and accuracy during extension and retraction, ensuring proper crane operation.

[0003] A double-section oil cylinder in the existing technology has a built-in telescopic anti-rotation mechanism. During operation, the second piston rod inside the cylinder rotates when it rises, causing the wires on the top lamp to become entangled. The same is true during the descent process, affecting its use. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that during operation, the second piston rod inside the cylinder rotates when rising, causing the wires on the top lamp to become entangled, and the same is true during the descent process, affecting use. A double-section oil cylinder with a built-in telescopic anti-rotation mechanism is proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a double-section oil cylinder with a built-in telescopic anti-rotation mechanism, including a telescopic oil cylinder main body, a base fixed to the bottom end of the telescopic oil cylinder main body, a first piston rod slidably connected to the telescopic oil cylinder main body, a second piston rod slidably connected to the end of the first piston rod away from the telescopic oil cylinder main body, a limiting rod is fixed on the inner wall of the telescopic oil cylinder main body, and a connecting sleeve matching the limiting rod is provided in the second piston rod.

[0006] Preferably, a first oil inlet is provided on the outer wall of the base, the first oil inlet is connected to the telescopic cylinder body, and the connection point between the first oil inlet and the telescopic cylinder body is located behind the first piston rod.

[0007] Preferably, a first limiting sleeve is fixed to the front end of the telescopic oil cylinder body, the first piston rod is slidably connected to the first limiting sleeve, and the communicating hole of the first limiting sleeve is smaller than the piston diameter of the first piston rod.

[0008] Preferably, a first clamping block is fixed to the outer wall of one end of the connecting sleeve facing the telescopic oil cylinder body, and the first clamping block is fixed to the first piston rod.

[0009] Preferably, a second oil inlet is provided on the outer wall of the first limiting sleeve and the first piston rod, and a top seat is threadedly connected to one end of the second piston rod away from the first piston rod.

[0010] Preferably, a second limiting sleeve is installed at one end of the first piston rod away from the telescopic cylinder body, and the communicating hole of the second limiting sleeve is smaller than the piston diameter of the second piston rod.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are:

[0012] In the present invention, through the arrangement of the limit rod and the connecting sleeve, when oil enters the telescopic cylinder body through the first oil inlet, the first piston rod is pushed and squeezed, driving the first piston rod to move. When the first piston rod moves to the limit, the second oil inlet on the outer wall of the first piston rod will be connected to the second oil inlet on the outer wall of the first limit sleeve. At this time, oil is introduced through the second oil inlet, which will push the second piston rod to move. When the second piston rod moves, the second piston rod will not rotate due to the limited sliding of the limit rod and the connecting sleeve, which is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention provides a schematic diagram of the deployment structure of a double-section oil cylinder with a built-in telescopic anti-rotation mechanism;

[0014] Figure 2 This is a schematic diagram of the external structure of a limit rod with a built-in telescopic anti-rotation mechanism for a double-section oil cylinder proposed by the present invention;

[0015] Figure 3 The present invention provides a schematic diagram of the interior of a first limiting sleeve of a double-section oil cylinder with a built-in telescopic anti-rotation mechanism.

[0016] Legend: 1. Telescopic cylinder body; 2. Base; 3. First oil inlet; 4. First limit sleeve; 5. First piston rod; 6. Second limit sleeve; 7. Second piston rod; 8. Top seat; 9. Limit rod; 10. Connecting sleeve; 11. First clamping block; 13. Second oil inlet. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Example 1, as Figure 1-3 As shown, the present invention provides a double-section oil cylinder with a built-in telescopic anti-rotation mechanism, including a telescopic oil cylinder body 1, a base 2 is fixed to the bottom end of the telescopic oil cylinder body 1, a first piston rod 5 is slidably connected inside the telescopic oil cylinder body 1, and a second piston rod 7 is slidably connected to the end of the first piston rod 5 away from the telescopic oil cylinder body 1, a limiting rod 9 is fixed on the inner wall of the telescopic oil cylinder body 1, and a connecting sleeve 10 matching the limiting rod 9 is provided in the second piston rod 7.

[0020] The effect achieved by the entire embodiment 1 is that when the second piston rod 7 moves, the second piston rod 7 can be limited due to the limiting sliding of the limiting rod 9 and the connecting sleeve 10, so that the second piston rod 7 will not rotate, and the practicality is stronger.

[0021] Example 2, as Figure 1-3 As shown, a first oil inlet 3 is provided on the outer wall of the base 2, and the first oil inlet 3 is communicated with the telescopic cylinder body 1. The connection between the first oil inlet 3 and the telescopic cylinder body 1 is arranged behind the first piston rod 5. A first limiting sleeve 4 is fixed to the front end of the telescopic cylinder body 1, and the first piston rod 5 is slidably connected to the first limiting sleeve 4. The communicating hole of the first limiting sleeve 4 is smaller than the piston diameter of the first piston rod 5. A first clamping block 11 is fixed to the outer wall of the end of the connecting sleeve 10 facing the telescopic cylinder body 1, and the first clamping block 11 is fixed to the first piston rod 5. A second oil inlet 13 is provided on the outer walls of the first limiting sleeve 4 and the first piston rod 5. The end of the second piston rod 7 away from the first piston rod 5 is threadedly connected to the top seat 8, and the end of the first piston rod 5 away from the telescopic cylinder body 1 is installed with a second limiting sleeve 6. The communicating hole of the second limiting sleeve 6 is smaller than the piston diameter of the second piston rod 7.

[0022] The effect achieved by the entire embodiment 2 is that the telescopic cylinder body 1 is installed in a fixed position through the base 2, and the installation of the lighting lamp is facilitated by the setting of the top seat 8. The communicating hole through the first limiting sleeve 4 is smaller than the piston diameter of the first piston rod 5, which prevents the first piston rod 5 from directly sliding out of the telescopic cylinder body 1 when pushed by oil. The communicating hole through the second limiting sleeve 6 is smaller than the piston diameter of the second piston rod 7, which prevents the second piston rod 7 from directly sliding out of the second limiting sleeve 6 when moving, and has stronger stability.

[0023] Working principle: When the device is in use, the telescopic cylinder body 1 is installed in a fixed position through the base 2, and the top seat 8 is set to facilitate the installation of the lighting lamp. When the oil enters the telescopic cylinder body 1 through the first oil inlet 3, the first piston rod 5 is pushed and squeezed, driving the first piston rod 5 to move. When the first piston rod 5 moves to the limit, the second oil inlet 13 on the outer wall of the first piston rod 5 will be connected to the second oil inlet 13 on the outer wall of the first limiting sleeve 4. At this time, oil is introduced through the second oil inlet 13, which will push the second piston rod 7 to move. When the second piston rod 7 moves, the second piston rod 7 will not rotate due to the limited sliding of the limiting rod 9 and the connecting sleeve 10, thereby driving the second piston rod 7 to move, driving the lighting lamp installed on the top seat 8 to adjust the height, which is more practical.

[0024] The above description is merely a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any person skilled in the art may utilize the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change, and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A double-section oil cylinder with a built-in telescopic anti-rotation mechanism, comprising a telescopic oil cylinder body (1), characterized in that: A base (2) is fixed to the bottom end of the telescopic oil cylinder body (1), a first piston rod (5) is slidably connected inside the telescopic oil cylinder body (1), an end of the first piston rod (5) away from the telescopic oil cylinder body (1) is slidably connected to a second piston rod (7), a limiting rod (9) is fixed on the inner wall of the telescopic oil cylinder body (1), and a connecting sleeve (10) matching the limiting rod (9) is provided inside the second piston rod (7).

2. The double-section oil cylinder with built-in telescopic anti-rotation mechanism according to claim 1, characterized in that: A first oil inlet (3) is provided on the outer wall of the base (2), the first oil inlet (3) is connected to the telescopic oil cylinder body (1), and the connection point between the first oil inlet (3) and the telescopic oil cylinder body (1) is located behind the first piston rod (5).

3. The double-section oil cylinder with built-in telescopic anti-rotation mechanism according to claim 1, characterized in that: A first limiting sleeve (4) is fixed to the front end of the telescopic oil cylinder body (1); the first piston rod (5) is slidably connected to the first limiting sleeve (4); and the communicating hole of the first limiting sleeve (4) is smaller than the piston diameter of the first piston rod (5).

4. The double-section oil cylinder with built-in telescopic anti-rotation mechanism according to claim 1, characterized in that: A first clamping block (11) is fixed to the outer wall of one end of the connecting sleeve (10) facing the telescopic oil cylinder body (1), and the first clamping block (11) is fixed to the first piston rod (5).

5. The double-section oil cylinder with built-in telescopic anti-rotation mechanism according to claim 3, characterized in that: A second oil inlet (13) is provided on the outer walls of the first limiting sleeve (4) and the first piston rod (5), and a top seat (8) is threadedly connected to one end of the second piston rod (7) away from the first piston rod (5).

6. The double-section oil cylinder with built-in telescopic anti-rotation mechanism according to claim 1, characterized in that: A second limiting sleeve (6) is installed at one end of the first piston rod (5) away from the telescopic oil cylinder body (1); the communicating hole of the second limiting sleeve (6) is smaller than the piston diameter of the second piston rod (7).

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